Gaskill, Jack D., author
John Wiley & Sons, 1978
Buku Teks
Young, Hugh D., 1930-, author
McGraw-Hill , 1976
Buku Teks
Edited by A.D. Boardman
John Wiley & Sons, 1980
Buku Teks
Jenkins, Francis A., author
McGraw-Hill Book, [date of publication not identified]
Buku Teks
Welford, W.T.
Oxford University Press, 1990
Buku Referensi